摘要
The microstructures of the as-rolled magnesium alloy subjected to dynamic plastic deformation along the rolling direction have been investigated.Mostly one{101-2}twin variant or a twin variant pair is activated in a grain,leading to a parallel{101-2}twin lamellar structure.At the stage of twinning-dominated deformation(ε〈-8%),lamellar thickness decreases significantly with strain,from 5.55 to 2.49 pro.The evolution of lamellar thickness during deformation is directly related to{1012}twin activity.When plastic strain is greater than-8%,the twin lamellar structure disappears because the volume fraction of twins almost saturates at a value of-90%.
基金
supported by National Natural Science Foundation of China(Nos.51071183,50890170 and 51271208)
the Fundamental Research Funds for the Central Universities(No.CDJXS11132225)
